{
  "manageEntity": {
    "action": "Save",
    "entityId": "1037803750",
    "entityType": "Track",
    "nonce": "0x5b19b71bc2e8acde46b409bc9f37bf43278773338c0fdee17a0839821e95c357",
    "signature": "0x1f81cf699fba0f71ab14231c3ff379d289a460f967f5d2ef8a72dff76b44409a7f178c6db33d4ca6c023372ffa3484ff3391397eb7c691286ed5c2db386187c31c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}