{
  "manageEntity": {
    "action": "Save",
    "entityId": "1959631165",
    "entityType": "Track",
    "nonce": "0xb0f1302592d98fb7c825fc47aede582eae936cb19aa4e89c9f35d82651a49588",
    "signature": "0xe74b85bf1743ee853c05c7ac293e5e0246fb0a5fd5754102bdbec8ae8ab1df2e361aa69f607cfe1ea40188d7a53463247cf7df213c40b8b297d17fde9e53233b1c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}