{
  "manageEntity": {
    "action": "Save",
    "entityId": "676860665",
    "entityType": "Track",
    "nonce": "0xf0eae933946de2ebaf76809a664fd3a7b921d43f629d3438dcf28917c71f7d05",
    "signature": "0x562458e825a2022569e13fcc8964bcbefa4466bc31b075d07d84a0f96012b69b727636038104aa25613863484f8303e028d3eb07a3fb7cf5ac2d7d3b7b6964e51b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}