{
  "manageEntity": {
    "action": "Save",
    "entityId": "711736920",
    "entityType": "Track",
    "nonce": "0xc4da3d4b2906a433ffff2b14eb8c27655d5dfd6b93d9cf7bc82b84885227802a",
    "signature": "0x1dfbd0a3ad1f54e738a1a87908df918a2c15b04f1272429aa07b5514141dee877175470aaa10742d1943f2d639a3e98bc1fa460c0b791f453975372656db811c1c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}