{
  "manageEntity": {
    "action": "Save",
    "entityId": "292134064",
    "entityType": "Track",
    "nonce": "0x2e18fb8cf40f1d4a1aead4346e0ce28ab9bcbfc2b89b1ba45621c1a8a387a8be",
    "signature": "0x779af3e680a53fd35dc2c68b6249be9e2f1722e3f303c149bd4ee6a6fff97beb164aa8d2132096ba34ca2a29887d6e0864aa8a93e02a449219c1d26a128655b71c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}