{
  "manageEntity": {
    "action": "Save",
    "entityId": "734391193",
    "entityType": "Track",
    "nonce": "0x936fbe081c5a5a749cf4280c5c19c6982a60c63d5bda3e7e85f35f5597d08fde",
    "signature": "0x8453a7edc228bdf0887d0595937254d2253144af00fb32a731de2b9388653b5c2cbb3f938c6443e7f0c42ffbdc9b52d6dbbcc51e1cce8fc82c36775544fe98f81c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}