{
  "manageEntity": {
    "action": "Save",
    "entityId": "462162290",
    "entityType": "Track",
    "nonce": "0x680b9b1942ec145a9d52fab2637fbddbaae9e1acc35b1074b1020d7cd50e962f",
    "signature": "0x477c0fd9d7398481dc1a5368f6600f6b49355eb40073bdd60a9c79ae4c8e69002fb0668c169450040b141941be33d12259fe91677368aa96323de94b8a1164b31b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}