{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "1471740652",
    "entityType": "Track",
    "nonce": "0xa3834874f40bccf1ba9b5eb4938967d77f44e3c1cfcf42e3f74bf2b21254903c",
    "signature": "0x5510b9b4871ec5ef840935c38013703b3476bdc6290c72700bccb06ddec3f7a739036f9a6f288f6f74d42528d4af0de77f3283395bd93b8c0746a87fc174eca61c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}