{
  "manageEntity": {
    "action": "Save",
    "entityId": "562972081",
    "entityType": "Track",
    "nonce": "0x535e393fa10463c186eae7253732b91f3862687ac0e5b62fc1a99324aafe3662",
    "signature": "0x9f042a62b5c744520642f2f678c2ea4e3d96e1cf6fd412dd42df08bdf4e3fd0c115e09dc4ff071c98b53d8dd35e54cc482a6d5da81ce8d9677d9789b25a768de1c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}