{
  "manageEntity": {
    "action": "Save",
    "entityId": "1892405197",
    "entityType": "Track",
    "nonce": "0x5e2892c5d20ddcb7b4ac4437956ad1eb6f3ade0660dd3ad391b270bb5b144332",
    "signature": "0xbe4ee32b231e6fbecae6fa82b116b51d41134b62b6a863322db141c7cec7a2db5d8e86cc9653c03f9cb997285f502dfa40bc1e5a3da4212eaccf5431bdf804721b",
    "signer": "0x047E833C4745Eb958776b4941052F72f30bFBd08",
    "userId": "276517"
  }
}