{
  "manageEntity": {
    "action": "Save",
    "entityId": "1780684763",
    "entityType": "Track",
    "nonce": "0x9b2c541ff6106cb71b35f74e4787649a46f1173c420cf7eaee468a79a8c94206",
    "signature": "0x2d0dcf416dc8375a34367936e84d62f52564525645e9e054388434201d517d1871249fcfd625674ee290119d1975f467acef7846fed7009205c9bb872d4a79cb1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}