{
  "manageEntity": {
    "action": "Save",
    "entityId": "708643",
    "entityType": "Track",
    "nonce": "0xdd46c46f8cb27d97b6f44c93a04bc96ac34b89a515384468040b34ed3783fbe9",
    "signature": "0x0b7095c9c1a06f1d6ff173f53c923b4f72798de6a1c2ff33fdeec9d6fd78b1665de346b520d9efc0e6b63dd75f9276c789d0b1b0ae5effd5e52fef31f3d750501c",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}