{
  "manageEntity": {
    "action": "Save",
    "entityId": "889618355",
    "entityType": "Track",
    "nonce": "0x832bce92c7e40e89b349f912dc54feeac1a6f759faf48104e938085877e45ea1",
    "signature": "0x8d528bf945d58ae69a5bfcc6b7383d8222fa6ea682e96dac9ac0d880393ade5b4f35927211c34ac5bb60e8ad81f9bb2081091149e376d237b74cd48d781297231b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}