{
  "manageEntity": {
    "action": "Save",
    "entityId": "2035618725",
    "entityType": "Track",
    "nonce": "0x3715bee75464b133bee1536a8cdf1039b4c6e84009143beb9e4373b79aec07c0",
    "signature": "0x1bb94ab11b28a591cc791b3c9a8c29b6cc1eed0832abc72702e98f6e23f6a2097ffc8a2b576424ce702c668c1c9bc076c4b675c1c3841761691a683fa9498f271b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}