{
  "manageEntity": {
    "action": "Save",
    "entityId": "801566101",
    "entityType": "Track",
    "nonce": "0xd4375b13ae34d9bc5bcc31f268f14013736614915961d18ba955347953b112fc",
    "signature": "0x997065b2b93e14b146716121315dd2d663ae82fe63e2e35abc310a920d494ef6775fd4ab8ac078df41e32c65fbe7009eb7f503b10736def5200a829b0f91321c1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}