{
  "manageEntity": {
    "action": "Save",
    "entityId": "424161890",
    "entityType": "Track",
    "nonce": "0xfd7cc2226d02a82f988b015341082cbf07cc77c17c1fad7e775336d3c0a0a826",
    "signature": "0xf7c174b161be1194d79c389233000575c254a4639ed29773e82657bc38c865227f5e439d0ffc1b6ed772f462615de081be654da1cfb78c5597d03fd0febac2d61b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}