{
  "manageEntity": {
    "action": "Save",
    "entityId": "97972913",
    "entityType": "Track",
    "nonce": "0x8fbfadbf8be793de22a4c2675e74b624da8ad1a477fad6ad69d0733f6eed5911",
    "signature": "0x8d34858054cf3003411a2c54b48be178c604082fb071ba2b9a1bbad2ddba66537610b623779cf2ef0b7efcfecfbb5a4d5568aaa2052bdc1368d7f3f354134e181b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}