{
  "manageEntity": {
    "action": "Save",
    "entityId": "1911301457",
    "entityType": "Track",
    "nonce": "0xbe66d5c89c9e9b77da647c0c99be99a2e4741a635f68bde27af1c9d23d76d68e",
    "signature": "0x102b4bac7990464ce435d6acb293255755e9287be61b16cb67876a09193049527dc66bae2877df88cf86ec2fdb79f179fe2298f86cd1e4629585a72377a04e1d1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}