{
  "manageEntity": {
    "action": "Save",
    "entityId": "1959614122",
    "entityType": "Track",
    "nonce": "0xd4f16b3a96d6481e5ee031ef10d1575ec6dc4ae09e28527e35ccad65e1dcf92d",
    "signature": "0x0c4cfaea42104ea23093d507fcb8556a7ab40430e31ea631ff55684d08ebeb6f389368ad5ca48e43ee07a1198e7f565481dc31cf8e9e360b7662e61a83c316001b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}