{
  "manageEntity": {
    "action": "Save",
    "entityId": "351558519",
    "entityType": "Track",
    "nonce": "0xadfd7e532a8794dd344f77bac38c2e12a9c92816a05004f727ab393b099d11ab",
    "signature": "0x8a87106ac0af0520d1fae32aef0be0bd9f2c55a2ac7fc7c4d313836c9456bc0377764b8fe92ffc401727ae836a6d65de758de913d270e623f7715f7616540b001b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}