{
  "manageEntity": {
    "action": "Save",
    "entityId": "274267",
    "entityType": "Track",
    "nonce": "0x38c859d46bd7b2e157403d042f360189940d8d659a7096f4922907aac44f0800",
    "signature": "0xaf94c3f2ea03d30eb25d677f01937d5a084ea048188d7f27b30dcf614cc4de79037f3cfaa3a72c9bb128e75631063b69a5343e01ba2a209cea023bbea498c4c91c",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}