{
  "manageEntity": {
    "action": "Save",
    "entityId": "736261808",
    "entityType": "Track",
    "nonce": "0x4c5b7ab558125c3bfa68d9c3c2319db7231e9f1480ce3c11ec8051f8fd5de4dc",
    "signature": "0xc36f5352ee73e15636367db462beee5bc4588cfced2a99178dfe43b679139d005b1308abfd70698bfe7dbdaf720f7e4e5e63f21fd60a3d01aa8bb6b214fbaa5a1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}