{
  "manageEntity": {
    "action": "Save",
    "entityId": "132495378",
    "entityType": "Track",
    "nonce": "0x58e3c44cfcefaab353d50ad1297d4c0bd68875b0775fead116fbfd4dfb2099e0",
    "signature": "0x06b72fa65f66aa184715784cd78e1153fd02d18e1a44b2431d041c01265669ff78dd3bef3e54d59906ea98e4159978cff4192eebf1423ac0f9989620b26f448f1c",
    "signer": "0xf954E35976C0aAaEC2968197F2a371Cc99E7C81A",
    "userId": "102143"
  }
}