{
  "manageEntity": {
    "action": "Save",
    "entityId": "1043469",
    "entityType": "Track",
    "nonce": "0x13273f60299327e63df19097f7ee8f895730806f5665e66ef99e49283eb72a8c",
    "signature": "0x3651a9ac2a7c2330b90513f7e7078fc16d7b820180acc96e2afe8cc33d301b204334aaeb5b1a8c53536626aed8aebf55572d83c2e29eba38609eea204bf2c1a41b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}