{
  "manageEntity": {
    "action": "Save",
    "entityId": "1896050983",
    "entityType": "Track",
    "nonce": "0xe1d2719e8a238b2d3d3edb3f2aae2d9e7cde01b4d9aeabd1e3ca835cb6595251",
    "signature": "0xfd47be8cc8a619d5b50f6e90bc8bce7e095ab40191bca401130834ec4d839ef74540c29a96ff232e6b91c9acd5ee3bcafec4b5b7a84215eadafeefacfa492a0c1c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}