{
  "manageEntity": {
    "action": "Save",
    "entityId": "605254797",
    "entityType": "Track",
    "nonce": "0x9cb7ac74f3962dce4aed8f34c42ccc37f7eb24116f89e050eece033c09911857",
    "signature": "0x0335077b83260e9e3f9e4e0aad8696c99a658b15763d82e61cdde110cf932df5232f9888bf69a08b1fc9bae448bfd8da63710044aac5267379c42bd976f577c01c",
    "signer": "0x7Cd44Dc53B13eEA7335A000Ce36c05cDFE34b348",
    "userId": "355113"
  }
}