{
  "manageEntity": {
    "action": "Save",
    "entityId": "847738220",
    "entityType": "Track",
    "nonce": "0x0073160377a6e860c52faa7ada554ff860fcdc7ea9efe2c205a41ffb2afb7fb3",
    "signature": "0xca3862008f3ee6be3d5656588db2fbcf9ef7f3fee1072df85f600d46984c09e8724197f325c6f3dc55b45c4f1339d2f41507cc9d80e9aa58e2f5206950f87d5b1c",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}