{
  "manageEntity": {
    "action": "Unrepost",
    "entityId": "502387264",
    "entityType": "Track",
    "nonce": "0x09387af9563bbb2dce4aa969584c3997c58b16abe311dc8e3b2aff251aa4ee78",
    "signature": "0xa3634e9f38175e094b56ccde5e17a92660621bca98f2b3bab060198aead521ad49da3a32eac31b381d678acfc88063e60088dd3bfba4d1338eeaaf7e5a03546a1b",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}