{
  "manageEntity": {
    "action": "Save",
    "entityId": "1969413931",
    "entityType": "Track",
    "nonce": "0xb0b341efe202f4f16dca98a5cff760b39d3b649b8ee9224d6a3976af43e671aa",
    "signature": "0x8edef2e7a6df2e5d548c4e8962ee6b15b1ed797ce3b9a1d7cb4b02eaae1f0e5023ba9d32409713156c8ac816f190643f110ec6dd74436239139c711b9d13c8fd1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}