{
  "manageEntity": {
    "action": "Save",
    "entityId": "1283200744",
    "entityType": "Track",
    "nonce": "0xbb23b25e2a910c591b477445f84c37b26787048e8fdf6bc14ae816769816145a",
    "signature": "0x4eb41cd35f06bc5f3afffb69fd1d349a7a5e2ee5ced68f62233eccebd58aae8e5a8070e84de013e5bd5ec16c9a5db9c067bac5a13401cde2a31f51e705a04eb01b",
    "signer": "0x7b52e6AA15Db4Fc3A84AFF2b12e5B8B128eA8610",
    "userId": "808512351"
  }
}