{
  "manageEntity": {
    "action": "Unrepost",
    "entityId": "252577",
    "entityType": "Track",
    "nonce": "0x780e2a034a18b43342af78412d6c606d15f2cf651d12ddb4e968900664797b20",
    "signature": "0x7f4f20a34b21bcac66f87db20d84332d455a613a3d1c11f86fcd057ce4b6a932406dd0b4758b6bc9f9ecb8320d0dc2a45ca2679ce53be030eea612514b5e015c1b",
    "signer": "0xcdc1772589e70ee6667FAaC93E3F0CcD5BFDa2aE",
    "userId": "354908"
  }
}