{
  "manageEntity": {
    "action": "Save",
    "entityId": "1299988210",
    "entityType": "Track",
    "nonce": "0x2d6d029a50e0000365cdb7e6ab62fa0efcb8d275021bc6ca6ba6c6e5ad1a7838",
    "signature": "0xee5b13d6f24a96ffd6680cc859a3428a812f6c630ac3a2a956f0002b03d4b95e576dfe43d0378dbadb7ca103256e18c962f7eed74eb5eb0edb15f4060540a9711c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}