{
  "manageEntity": {
    "action": "Save",
    "entityId": "1195257362",
    "entityType": "Track",
    "nonce": "0x32d0859de294c808bc11c52a7d8a755cc6b3223db173114a90d1991f02814248",
    "signature": "0x3a403eee4c531f02863a5abfe66becfc7ee6707780250b0813780c2948a761343cc73510d3b2616b616eeb1acc9f6af201f49a1fa2497119bc0064c255cb16901b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}