{
  "manageEntity": {
    "action": "Save",
    "entityId": "1688115651",
    "entityType": "Track",
    "nonce": "0xa35c7397301a33c977ae7af06a69e4ed27f791cf2aee1ac0837ffd1cd0973535",
    "signature": "0xa6ef68f984fdf35a8254609067bc13a652b7c3b2ae2317855d4fbf7cdb7123cd51386976e241d0b32ad7cd67385da86ca715fd7350d85adb591a594a1013d6931b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}