{
  "manageEntity": {
    "action": "Save",
    "entityId": "282312769",
    "entityType": "Track",
    "nonce": "0x8ede86435460a492ffad6836d16335aec3a33ba9f61db3ba5a7e313b4e723169",
    "signature": "0x5f146b1cd4699bd38b68a0aee25bbd7345e6c0af79304a6edc49fd8ccb8f0b081a218e7a41526ed5d3eb2d41c2fdc7decd4f69c102f1fc9baf9c2f91b5f340f31b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}