{
  "manageEntity": {
    "action": "Save",
    "entityId": "918336389",
    "entityType": "Track",
    "nonce": "0xcc8fedcce1a65d48956665009c1156cdefa8d9053bb714b0f0e58498b3a9d8ee",
    "signature": "0x359c523b1c8bb850f300de360477f4cc047131f6ab627e4f9f3a59a8ffe022134f1e34c203603e6d7be1968c39e1c41ab65e323d7ad1d2f875715c018f1c2e901c",
    "signer": "0x849938DF063059EbF6d907f55E72C083347C9343",
    "userId": "796529120"
  }
}