{
  "manageEntity": {
    "action": "Save",
    "entityId": "762529187",
    "entityType": "Track",
    "nonce": "0x7a59a0fb71489093fcacc1eac24d92f6bd5038489b39e20632fd4b3163539569",
    "signature": "0x60314c7dd36e705fbebe0cd43d28ac144a90e78a927402ab2198a51a1c6dbad6243be570ccad1825d23ce6349f6527f3bc9e67481069df15342fe6856fec43b01c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}