{
  "manageEntity": {
    "action": "Save",
    "entityId": "1333337636",
    "entityType": "Track",
    "nonce": "0xe46c149908aca2a0177f06179bf3612b64994d90a355b1341a0f4dd4b4f5979c",
    "signature": "0x885c38ff7c00c40fb8df1c066bb70f65c076259b34e5dc8b74a34d40cfac43fd545cf80b2a104ea5439773dec8bd29c1c69c3235c8c0f857972d1640707101101b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}