{
  "manageEntity": {
    "action": "Save",
    "entityId": "962765174",
    "entityType": "Track",
    "nonce": "0xc10e209f898ef65035af1de2cea9d894fcaac4bc9fc337261af52e3b1d254096",
    "signature": "0x18799977f2633eb4b88403c370bf3c8a39403c95f206a5c7bf52d524e7398f765a81f4cf23c89105c7c8f4f03314681547533f0faa0b674084e2f70ae8a63f441b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}