{
  "manageEntity": {
    "action": "Save",
    "entityId": "2053857502",
    "entityType": "Track",
    "nonce": "0x492e143d7d1b3da9b79704d2f330addc88f4b0a9078dc5cafbb0d36d20adb75a",
    "signature": "0xfe66e7cea673638aba4faf4615c7c2b3e2088d85b7da77d9bd22dd43ca9683bd32af1cf017c6370247c555bbc2cd2f0ac3e913271ff14b41c29df6e5374bff0a1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}