{
  "manageEntity": {
    "action": "Save",
    "entityId": "1635334020",
    "entityType": "Track",
    "nonce": "0x5da5a7eab80310a644a96a3246ca64a05b0d6863686268a338c95f509a538d5d",
    "signature": "0x2a25f9310b8476b52f8d4ee8fb9f41b076760eba2bbc9bb1b0a22bfafbd31d425f9ccf18dfa39f50f5af7a1de0bc6ef0b43f4b6844a771176532cb95e7d01b5f1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}