{
  "manageEntity": {
    "action": "Save",
    "entityId": "1527378865",
    "entityType": "Track",
    "nonce": "0x76d33d49eb572e6461b95a95d81da8c4188422c25df5ca087794c38643d227d2",
    "signature": "0x7b1424faf5c252755a29ff605b931ae46d8f90dce403424a0e7c1b1e1d78c2905f14ef6d8172dfa882e883248556b1fc5fa27159dd0027e035cbeb07ce4869261c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}