{
  "manageEntity": {
    "action": "Save",
    "entityId": "1108501",
    "entityType": "Track",
    "nonce": "0x5da0e744acaae58c168b261b0ce3a2b628901804d65d5e11aaf7cf6f0b5f7028",
    "signature": "0x5b4cb2cf034ad939570a07d029218e6066b29bbdb81ec21ad6cc3b36bfdcc3e806f09570ab958df140a278ab8b3d03b50272f472bcd3b6b2201b651bb432db851b",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}