{
  "manageEntity": {
    "action": "Save",
    "entityId": "49290406",
    "entityType": "Track",
    "nonce": "0xdb4e852a5fb167140d5a739d0cd48783960ecdcf73f56069b63b81d693d7df42",
    "signature": "0x1a357c892dc7ae0d6c8527ecba6ebd77b930a13f1b2ac72aeece564ffadf71231ca264371e19cdce8245217b0007d1b96b441ed9c19c675f6b61be5615a1b2571c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}