{
  "manageEntity": {
    "action": "Save",
    "entityId": "1846585789",
    "entityType": "Track",
    "nonce": "0xa02fc980c0eaf1a95ed9471d6e255ef4b47a19ad4c426e9fc7ced62e7b5a52fb",
    "signature": "0xa8d5e2150b79607d9edb88d900c412db46135e1ae461f5425aaa38b4663f7a9b6be99650904a666fbad30847ead5c0e535db993e52aa7bdea5c920a719e50c471b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}