{
  "manageEntity": {
    "action": "Save",
    "entityId": "410813",
    "entityType": "Track",
    "nonce": "0x5f5a0230b61ff789fe97f5db1d54695b00ab8dbc1d64323b93ce6c368683d6d7",
    "signature": "0x303d457fc62ed63c1e4eef3554f969f9d6ab383baf85798b5954c195c4d50adc3847ec1b299295c7acc90165593b0ae3ad0ee15172592c3564d4ac6322c7abc41b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}