{
  "manageEntity": {
    "action": "Save",
    "entityId": "1817866645",
    "entityType": "Track",
    "nonce": "0xdce50824fa1370bb83842f099b00a54c86e9b03a35ea1faefd2bd62d9e3cfd6f",
    "signature": "0x51b35e313975dabdf79688e0a450258728b7788cafd0c2ac8f40958110ff52a47901a2b620941a577e6cf46f12166c2418d8ab8d16d6f3bc9fd0eab610ac07081b",
    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}