{
  "manageEntity": {
    "action": "Save",
    "entityId": "187092507",
    "entityType": "Track",
    "nonce": "0xdcdd6e25d8b2c3e8f15bae1770d666e3076eb5d5d8ec38d0fa32af6023abe6c4",
    "signature": "0x716a7c158f693ae917bcbaa695131bc6112d8a0335a23f3611d209ff17ffc9126347dd9b37503c68a183ea8b1c628c560abcb768473490d5e873dc60ab1dbd171c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}